Being a single man, I don't have a "real" boss.
I'm planning a drive out to Mossy Creek in the morning. I've yet to master that stream...maybe I never will but it won't be for a lack of trying.
I read your report on the Hughes. I wouldn't waste any time down below in the stocked sections of that stream. The wild brookies up inside the Park boundary are a lot more fun. Also check out the Rose, Rapidan, White Oak Canyon Run and the Conway. All are within about 1/2 hour of the Hughes.
If you haven't been back to the Upper Jackson, you should plan something. It's one of my favorites. Stay away from any weekend when it's been recently stocked though. It can be a mad house. As you suspected the fishing is bettter the farther you get back in there. Keep going on the trail as it goes away from the stream and continue on over the mountain. On the way back you can wade the stream and cut that section out.
I was interested in your review of Back Creek and the pics. I've always wanted to give it a try but always end up on the Jackson when I'm in the area.
Good luck and I hope you get out soon.